Function rte_dev_remove

dpdk/lib/eal/common/eal_common_dev.c:369–464

}

int
rte_dev_remove(struct rte_device *dev)
{
	struct eal_dev_mp_req req;
	char *devargs;
	int ret;

	if (!rte_dev_is_probed(dev)) {
		RTE_LOG(ERR, EAL, "Device is not probed\n");
		return -ENOENT;
	}

	ret = build_devargs(dev->bus->name, dev->name, "", &devargs);
	if (ret != 0)
		return ret;

	memset(&req, 0, sizeof(req));
	req.t = EAL_DEV_REQ_TYPE_DETACH;
	strlcpy(req.devargs, devargs, EAL_DEV_MP_DEV_ARGS_MAX_LEN);
	free(devargs);

	if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
		/**
		 * If in secondary process, just send IPC request to
		 * primary process.
		 */
		ret = eal_dev_hotplug_request_to_primary(&req);
		if (ret != 0) {
			RTE_LOG(ERR, EAL,
				"Failed to send hotplug request to primary\n");
			return -ENOMSG;
		}
		if (req.result != 0)
			RTE_LOG(ERR, EAL,
				"Failed to hotplug remove device\n");
		return req.result;
	}

	/* detach a device from primary start from here: */

	/* primary send detach sync request to secondary */
	ret = eal_dev_hotplug_request_to_secondary(&req);

	/**
	 * if communication error, we need to rollback, because it is possible
	 * part of the secondary processes still detached it successfully.
	 */
	if (ret != 0) {
		RTE_LOG(ERR, EAL,
			"Failed to send device detach request to secondary\n");
		ret = -ENOMSG;
		goto rollback;
	}

	/**
	 * if any secondary failed to detach, we need to consider if rollback
	 * is necessary.
	 */